液压滚切剪机位置压力主从控制的研究

Research on Position-pressure Master-slave Control of Rolling Shear Hydraulic System

以液压伺服系统的位置、压力主从控制为研究对象,以位置控制为主,压力闭环为辅助控制,在液压缸与外负载开始接触作用时,系统将压力信号实时地进行转化,然后与位置闭环的反馈信号同时作用于系统。首先建立液压伺服系统位置、压力主从控制的数学模型,并用AMESim仿真软件,从理论上证明这种方法是可行并且可靠的。最后,将此理论应用于液压滚切剪中,从实验结果可以看出,所提出的位置压力主从控制方法可以有效提高液压滚切剪液压伺服系统的液压缸位置精度以及稳定性。

This paper researches the position-pressure master-slave control of hydraulic servo system, which takes the position control as main, pressure control as supplementary. When the cylinder contacts the external load, system will transform the pressure signal to the signal which will add to the position control signal, and the pressure signal and position signal will affect the system at the same time. This paper first puts forward a new position-pressure mas-ter-slave control function, and then simulations are carried out by the software AMESim, which verifies this new function by theory. At last, this theory is used for the experimental rolling shear, the results show that this new func-tion can improve the stability and precision of the hydraulic system of rolling shear. This function can also be used for other high speed and heavy equipments.